CHG: added a comment

[proxmark3-svn] / client / util.c

diff --git a/client/util.c b/client/util.c
index 99a26a40ac20160a688139d9a86f59b37a5f4c09..4bbc992e588cfb381d703083b5f976994faae5b5 100644 (file)
--- a/client/util.c
+++ b/client/util.c
@@ -186,19 +186,16 @@ char *sprint_hex_ascii(const uint8_t *data, const size_t len) {
        return buf;
 }
 
-void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
-{
+void num_to_bytes(uint64_t n, size_t len, uint8_t* dest) {
        while (len--) {
                dest[len] = (uint8_t) n;
                n >>= 8;
        }
 }
 
-uint64_t bytes_to_num(uint8_t* src, size_t len)
-{
+uint64_t bytes_to_num(uint8_t* src, size_t len) {
        uint64_t num = 0;
-       while (len--)
-       {
+       while (len--) {
                num = (num << 8) | (*src);
                src++;
        }
@@ -212,6 +209,7 @@ void num_to_bytebits(uint64_t n, size_t len, uint8_t *dest) {
                n >>= 1;
        }
 }
+
 //least significant bit first
 void num_to_bytebitsLSBF(uint64_t n, size_t len, uint8_t *dest) {
        for(int i = 0 ; i < len ; ++i) {
@@ -220,7 +218,6 @@ void num_to_bytebitsLSBF(uint64_t n, size_t len, uint8_t *dest) {
        }
 }
 
-
 // aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
 // to
 // hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
@@ -549,6 +546,7 @@ void rol(uint8_t *data, const size_t len){
 }
 
 // Swap bit order on a uint32_t value.  Can be limited by nrbits just use say 8bits reversal
+// And clears the rest of the bits.
 uint32_t SwapBits(uint32_t value, int nrbits) {
        uint32_t newvalue = 0;
        for(int i = 0; i < nrbits; i++) {